How far back do you need to go? AIS has pdfs of the award winners from 1999 to 2012 at:
http://www.irises.org/About_Ir...
You will also find many of them if you search the database here at ATP:
http://garden.org/plants/group...
You probably won't find quite all of them here, first because not all of them have been entered (yet
) and second because a search can only return a maximum of 1000 (I think) results and there are several thousand tall bearded iris that have won Honorable Mention and probably over 1000 have won the Award of Merit. You'll find a lot of them though.